comment

Author: beelauuu

lib/matplotlib/tests/test_collections.py

@@ -706,6 +706,9 @@ def test_set_wrong_linestyle():
 
 @pytest.mark.parametrize('ls', ['', ' ', 'none'])
 def test_scatter_empty_linestyle_pdf(ls):
+    # Regression test: '', ' ', and 'none' are documented "draw nothing"
+    # linestyle aliases but were not recognized by _get_dash_pattern, causing
+    # savefig to PDF to crash with "zero-size array to reduction operation maximum".
     plt.switch_backend('pdf')
     fig, ax = plt.subplots()
     ax.scatter([0, 1], [0, 1], ls=ls)

pyproject.toml

@@ -184,6 +184,7 @@ extend-exclude = [
     "doc/tutorials",
     "tools/gh_api.py",
 ]
+target-version = "py311"
 line-length = 88
 
 [tool.ruff.lint]
@@ -295,6 +296,7 @@ convention = "numpy"
 "galleries/users_explain/text/text_props.py" = ["E501"]
 
 [tool.mypy]
+python_version = "3.11"
 ignore_missing_imports = true
 enable_error_code = [
   "ignore-without-code",